FFT of data with initial dwell time offset

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tx213
tx213 2015-2-27
Hi all,
I have a data set acquired across time (N=32). The data is equally spaced between the first and last points;the spacing between the each point is 9 seconds.
However the first data point is collected at time = 5 seconds. The FFT is conditional on the data samples being evenly spaced, which it is. My question is how do I take into account this initial offset of 5 seconds?
Many thanks, T

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